From 627c745c53e83f65393dd9f369d15fa127b3b6a1 Mon Sep 17 00:00:00 2001
From: kearwood <none@none>
Date: Fri, 2 Sep 2016 14:45:54 -0700
Subject: [PATCH] Bug 1288193 - Ensure that the content process receives the
 presentation status of a VRDisplay immediately after adding or removing
 layers r=gw280 - Corrects issues with the onvrdisplaypresentationchange
 events being delayed by up to 5 seconds. - Caused a delay to enter or exit
 WebVR presentation on many sites.

MozReview-Commit-ID: 2LACZNwKIxW

--HG--
extra : rebase_source : ec689cd68422a8487a85e70d9e2dbb13b3a1c36c
---
 gfx/vr/VRDisplayHost.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gfx/vr/VRDisplayHost.cpp b/gfx/vr/VRDisplayHost.cpp
index 38504fdd2932..68746e4e413b 100644
--- a/gfx/vr/VRDisplayHost.cpp
+++ b/gfx/vr/VRDisplayHost.cpp
@@ -45,6 +45,10 @@ VRDisplayHost::AddLayer(VRLayerParent *aLayer)
     StartPresentation();
   }
   mDisplayInfo.mIsPresenting = mLayers.Length() > 0;
+
+  // Ensure that the content process receives the change immediately
+  VRManager* vm = VRManager::Get();
+  vm->RefreshVRDisplays();
 }
 
 void
@@ -55,6 +59,10 @@ VRDisplayHost::RemoveLayer(VRLayerParent *aLayer)
     StopPresentation();
   }
   mDisplayInfo.mIsPresenting = mLayers.Length() > 0;
+
+  // Ensure that the content process receives the change immediately
+  VRManager* vm = VRManager::Get();
+  vm->RefreshVRDisplays();
 }
 
 #if defined(XP_WIN)